h2 {
    border: 1px solid red;
    border-radius: 10px;
    border-width: initial;
    width: 33%;
    padding: 10px;
    text-align: center;
}

/* 盒阴影效果的参数是怎样的？ */

.box-shadow {
    box-shadow: 10px 10px 5px grey;
    width: 300px;
    height: 100px;
    background-color: seagreen;
}

/* 边界图片的属性是怎样的？ */

.round {
    border-image: url(7-2.jpg) 30 30 round;
}

.stretch {
    border-image: url(7-2.jpg) 30 30 stretch;
}

/* body
{
    background-image: linear-gradient(to right, red, yellow);
    background-repeat: no-repeat;
} */

.text {
    text-shadow: blue;
    border: 1px solid gray;
    border-radius: 4px;
    /* border-width: 33px; */
    width: 33%;
    padding: 10px;
    text-align: center;
    text-shadow: 3px 4px 2px blue;
    box-shadow: 11px 9px 4px grey;
    text-overflow: ellipsis;
    font-family: myFirstFont;
    src: url(sansation_bold.woff);
    /* overflow-wrap: break-word; */
    font-weight: bold;
    transition: width 2s, height 2s, transform 2s;
}

.text:hover {
    width: 1000px;
    height: 700px;
    transform: scale3d(90px 40px 30px);
}

.twoD-title {
    transform: translate(460px, -457px);
}

.twoD {
    border: 1px solid black;
    background-color: blueviolet;
    width: 50%;
    border-radius: 4px;
    box-shadow: 7px 8px 4px darkslateblue;
    padding: 10px;
    text-align: center;
    /* 同样的transform属性，会有一个被覆盖掉 */
    transform: skew(63deg, -3deg);
    transform: translate(458px, -455px);
}

.donghua-title {
    transform: translate(24px, -99px);
}

.donghua {
    border: 1px solid red;
    background: red no-repeat;
    padding: 50px;
    width: 50px;
    transform: translate(26px, -93px);
    box-shadow: 15px 6px 6px grey;
    position: relative;
    animation: myfirst 5s;
}

/* .donghua:hover
{
} */

@keyframes myfirst {
    /* from {background: red;}
    to  {background: yellowgreen;} */
    0% {
        background: red;
        left: 0px;
        top: 0px;
    }
    25% {
        background: yellow;
        left: 200px;
        top: 0px;
    }
    50% {
        background: blue;
        left: 200px;
        top: 200px;
    }
    75% {
        background: green;
        left: 0px;
        top: 200px;
    }
    100% {
        background: greenyellow;
        left: 0px;
        top: 0px;
    }
}

.column {
    column-span: all;
}

/* 
.user
{
    border: 1px solid seagreen;
    resize: both;
} */

.icon {
    content: icon;
    icon: url(7-2.jpg);
    border-radius: 50%;
    border: 1px solid gray;
    padding: 7px;
    max-width: 100%;
    height: auto;
    opacity: 0.7;
}

img.icon:hover {
    box-shadow: 4px 4px 13px black;
}

.container {
    position: relative;
}

.topleft {
    position: absolute;
    top: 38px;
    left: 120px;
    font-size: 16px;
}

.card {
    border: 1px solid #d8d2d2;
    border-radius: 4px;
    width: 500px;
    transform: translate(667px, -1000px);
}

.image-7-1 {
    border-radius: 4px;
}

.card-text {
    text-align: center;
    padding: 31px;
}

.btn-all {
    border: none;
}

.btn-1 {
    transform: translate(671px, -924px);
    padding: 19px 26px;
    background: green;
    border-radius: 6px;
    color: white;
    border: none;
    font-size: 22px;
    transition-duration: 4s;
    box-shadow: 4px 4px 4px grey;
    /* opacity: 0.6;
    cursor: not-allowed; */
}

.btn-1:hover {
    background-color: white;
    color: black;
}

.page {
    text-decoration: none;
    display: inline-block;
    margin: 10px;
    padding: 10px;
}

.page li {
    display: inline;
}

.page li a {
    color: black;
    border: 1px solid gray;
    padding: 8px 16px;
    text-decoration: none;
    float: left;
    border-collapse: collapse;
    border-radius: 5px;
}

.page li a:hover {
    background: #ece8e8;
}

div.page li a.active {
    background: green;
    color: white;
}

.border {
    border: 1px solid black;
    width: 300px;
    height: 100px;
    margin: 47px;
    padding: 10px;
}

.flex-container {
    background-color: burlywood;
    display: flex;
    width: 608px;
    height: 235px;
    border: 1px solid black;
    padding: 10px;
    margin: 38px;
}

.flex-item {
    border: 1px solid black;
    width: 100px;
    height: 100px;
    border-collapse: collapse;
    box-sizing: border-box;
    /* border-right: none; */
    background-color: yellowgreen;
    padding: 10px;
    text-align: center;
    margin: auto;
    align-self: auto;
    flex: 1;
}

.flex-item:last-child {
    border-right: 1px solid black;
}